Fix style issues

MediaBrowser.Api/Playback/BaseStreamingService.cs

@@ -137,10 +137,7 @@ namespace MediaBrowser.Api.Playback
         /// </summary>
         private string GetOutputFilePath(StreamState state, EncodingOptions encodingOptions, string outputFileExtension)
         {
-            var data = $"{state.MediaPath}-" +
-                       $"{state.UserAgent}" +
-                       $"{state.Request.DeviceId ?? string.Empty}-" +
-                       $"{state.Request.PlaySessionId ?? string.Empty}";
+            var data = $"{state.MediaPath}-{state.UserAgent}-{state.Request.DeviceId}-{state.Request.PlaySessionId}";
 
             var filename = data.GetMD5().ToString("N", CultureInfo.InvariantCulture);
             var ext = outputFileExtension.ToLowerInvariant();

MediaBrowser.Api/Playback/Hls/DynamicHlsService.cs

@@ -974,7 +974,8 @@ namespace MediaBrowser.Api.Playback.Hls
                 segmentFormat = "mpegts";
             }
 
-            return string.Format("{0} {1} -map_metadata -1 -map_chapters -1 -threads {2} {3} {4} {5} -f segment -max_delay 5000000 -avoid_negative_ts disabled -start_at_zero -segment_time {6} {10} -individual_header_trailer 0 -segment_format {11} -segment_list_type m3u8 -segment_start_number {7} -segment_list \"{8}\" -y \"{9}\"",
+            return string.Format(
+                "{0} {1} -map_metadata -1 -map_chapters -1 -threads {2} {3} {4} {5} -f segment -max_delay 5000000 -avoid_negative_ts disabled -start_at_zero -segment_time {6} {10} -individual_header_trailer 0 -segment_format {11} -segment_list_type m3u8 -segment_start_number {7} -segment_list \"{8}\" -y \"{9}\"",
                 inputModifier,
                 EncodingHelper.GetInputArgument(state, encodingOptions),
                 threads,